1
|
Chen B, Pan B, He X, Jiang L, Chan ASC, Qiu L. Access to chiral dihydrophenanthridines via a palladium(0)-catalyzed Suzuki coupling and C-H arylation cascade reaction using new chiral-bridged biphenyl bifunctional ligands. Chem Sci 2024; 15:6884-6890. [PMID: 38725491 PMCID: PMC11077526 DOI: 10.1039/d4sc00621f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 04/01/2024] [Indexed: 05/12/2024] Open
Abstract
A class of chiral-bridged biphenyl phosphine-carboxylate bifunctional ligands CB-Phos has been developed and successfully applied to Pd(0)-catalyzed single enantioselective C-H arylation and a one pot cascade reaction involving Suzuki cross-coupling and C-H arylation. The catalytic system provides a new and convenient way for the synthesis of versatile chiral dihydrophenanthridines with rich structures and broad functional group tolerance. Good to excellent yields with high enantioselectivities were generally achieved. The reaction mechanism of the cascade reaction was also preliminarily discussed.
Collapse
Affiliation(s)
- Bin Chen
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Bendu Pan
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Xiaobo He
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Long Jiang
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Albert S C Chan
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Liqin Qiu
- School of Chemistry, IGCME, The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-sen University Guangzhou 510006 People's Republic of China
| |
Collapse
|
2
|
Cheng H, Liu R, Fang S, Li Z, Zhang D, Zhang X, Chen W, Chen H, Kang L, Wang J, Xu Y, Song S, Shao L. Synthesis of easily-modified and useful dibenzo-[ b,d]azepines by palladium(II)-catalyzed cyclization/addition with a green solvent. Chem Commun (Camb) 2024; 60:3587-3590. [PMID: 38470314 DOI: 10.1039/d3cc06321f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
A novel strategy in which palladium(II)-catalyzed tandem cyclization is used to obtain N-heterocyclic architectures containing a seven-membered ring has been developed and used to synthesize a series of derivatives. The reaction uses an eco-friendly mixed solvent (water : EtOH = 2 : 1) instead of DMSO and maintains a high yield (91%). Its potential application value and reaction mechanism have also been explored.
Collapse
Affiliation(s)
- Hua Cheng
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
- China Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Xuhui District, Shanghai 200032, China.
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
| | - Rongqi Liu
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
| | - Shengyang Fang
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
| | - Zixiang Li
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
| | - Denggao Zhang
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
| | - Xi Zhang
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
| | - Wenfei Chen
- School of Medicine, Shanghai University, Shanghai 200444, China.
| | - Huixin Chen
- School of Medicine, Shanghai University, Shanghai 200444, China.
| | - Leyi Kang
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
| | - Juan Wang
- School of Medicine, Shanghai University, Shanghai 200444, China.
| | - Yulong Xu
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
| | - Shaoli Song
- China Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Xuhui District, Shanghai 200032, China.
| | - Liming Shao
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong, Shanghai, 201203, China.
| |
Collapse
|
3
|
Li F, Chen X, Huang BQ, Xu HD, Zhu CF, Shen MH. Palladium-catalyzed ring-opening [5+2] annulation of vinylethylene carbonates (VECs) and C5-substituted Meldrum's acids: rapid synthesis of 7-membered lactones. Chem Commun (Camb) 2024; 60:1774-1777. [PMID: 38252322 DOI: 10.1039/d3cc05819k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
A novel approach for the synthesis of unsaturated 7-membered lactones by Pd-catalyzed [5+2] dipolar cycloaddition of vinylethylene carbonates (VECs) and C5-substituted Meldrum's acid derivatives has been developed. Various Meldrum's acid derivatives worked well in this reaction under mild reaction conditions. A variety of 7-membered lactones can be accessed in a facile manner in moderate to good yields by employing easily prepared Meldrum's acid derivatives.
Collapse
Affiliation(s)
- Fei Li
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Xin Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Ben-Qing Huang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Hua-Dong Xu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Chi-Fan Zhu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Mei-Hua Shen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| |
Collapse
|
4
|
Wang X, Luo Y, Zhao J, Luo S. CPA-catalyzed asymmetric domino thia-Michael/aldol reactions for simultaneous chiral center and axial chirality formation. Org Biomol Chem 2023; 21:6697-6701. [PMID: 37554057 DOI: 10.1039/d3ob01087b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
A highly enantio- and diastereoselective domino thia-Michael/aldol reaction applying 5H-dibenzo[a,c][7]annulen-5-one as a Michael acceptor, catalyzed by a chiral phosphoric acid (CPA), has been developed. The bridged biaryl adduct contains multiple stereogenic centers in the bridging linkage as well as a thermodynamically controlled stereogenic axis. The energy difference between the two atropodiastereomers is about 9.1 kcal mol-1, which accounts for the observed excellent diastereoselectivity (>20 : 1).
Collapse
Affiliation(s)
- Xilong Wang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Yu Luo
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Jiaji Zhao
- School of Medicine and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528400, China.
| | - Shuang Luo
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, China
| |
Collapse
|
5
|
Chiba A, Tanaka R, Hotta M, Nakamura K, Makino K, Tabata H, Oshitari T, Natsugari H, Takahashi H. Stereochemistry of N-Acyl-5 H-dibenzo[ b, d]azepin-7(6 H)-ones. Molecules 2023; 28:4734. [PMID: 37375290 DOI: 10.3390/molecules28124734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/24/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
The stereochemical properties of N-acyl-5H-dibenzo[b,d]azepin-7(6H)-ones (2a-c), which inhibit potassium channels in T cells, were examined by freezing their conformational change due to 4-methyl substitution. N-Acyl-5H-dibenzo[b,d]azepin-7(6H)-ones exist as pairs of enantiomers [(a1R, a2R), (a1S, a2S)], and each atropisomer is separable at room temperature. An alternate procedure for preparing 5H-dibenzo[b,d]azepin-7(6H)-ones involves the intramolecular Friedel-Crafts cyclization of N-benzyloxycarbonylated biaryl amino acids. Consequently, the N-benzyloxy group was removed during the cyclization reaction to produce 5H-dibenzo[b,d]azepin-7(6H)-ones suitable for the subsequent N-acylation reaction.
Collapse
Affiliation(s)
- Arisa Chiba
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Ryoko Tanaka
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Mayuno Hotta
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Kayo Nakamura
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Kosho Makino
- Research Institute of Pharmaceutical Sciences, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hidetsugu Tabata
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Tetsuta Oshitari
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hideaki Natsugari
- Graduate School of Pharmaceutical Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideyo Takahashi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| |
Collapse
|
6
|
Pliushcheuskaya P, Künze G. Recent Advances in Computer-Aided Structure-Based Drug Design on Ion Channels. Int J Mol Sci 2023; 24:ijms24119226. [PMID: 37298178 DOI: 10.3390/ijms24119226] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Ion channels play important roles in fundamental biological processes, such as electric signaling in cells, muscle contraction, hormone secretion, and regulation of the immune response. Targeting ion channels with drugs represents a treatment option for neurological and cardiovascular diseases, muscular degradation disorders, and pathologies related to disturbed pain sensation. While there are more than 300 different ion channels in the human organism, drugs have been developed only for some of them and currently available drugs lack selectivity. Computational approaches are an indispensable tool for drug discovery and can speed up, especially, the early development stages of lead identification and optimization. The number of molecular structures of ion channels has considerably increased over the last ten years, providing new opportunities for structure-based drug development. This review summarizes important knowledge about ion channel classification, structure, mechanisms, and pathology with the main focus on recent developments in the field of computer-aided, structure-based drug design on ion channels. We highlight studies that link structural data with modeling and chemoinformatic approaches for the identification and characterization of new molecules targeting ion channels. These approaches hold great potential to advance research on ion channel drugs in the future.
Collapse
Affiliation(s)
- Palina Pliushcheuskaya
- Institute for Drug Discovery, Medical Faculty, University of Leipzig, Brüderstr. 34, D-04103 Leipzig, Germany
| | - Georg Künze
- Institute for Drug Discovery, Medical Faculty, University of Leipzig, Brüderstr. 34, D-04103 Leipzig, Germany
- Interdisciplinary Center for Bioinformatics, University of Leipzig, Härtelstr. 16-18, D-04107 Leipzig, Germany
| |
Collapse
|
7
|
Synthesis of 5,6-Dihydrophenanthridines via Palladium-Catalyzed Intramolecular Dehydrogenative Coupling of Two Aryl C−H Bonds. Molecules 2023; 28:molecules28062498. [PMID: 36985470 PMCID: PMC10055664 DOI: 10.3390/molecules28062498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
5,6-Dihydrophenanthridines are common aza heterocycle frameworks of natural products and pharmaceuticals. Herein, we reported the first palladium-catalyzed intramolecular C−H/C−H dehydrogenative coupling reaction of two simple arenes to generate 5,6-dihydrophenanthridines. The approach features a broad substrate scope and good tolerance of functional groups, offering an efficient alternative synthesis route for important 5,6-dihydrophenanthridine compounds.
Collapse
|
8
|
Cheng S, Luo Y, Yu T, Li J, Gan C, Luo S, Zhu Q. Palladium-Catalyzed Four-Component Cascade Imidoyl-Carbamoylation of Unactivated Alkenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c05319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sidi Cheng
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
| | - Yu Luo
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
| | - Ting Yu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
| | - Jing Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
| | - Chunfang Gan
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, People’s Republic of China
| | - Shuang Luo
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
| | - Qiang Zhu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, People’s Republic of China
| |
Collapse
|
9
|
Gubič Š, Hendrickx LA, Toplak Ž, Sterle M, Peigneur S, Tomašič T, Pardo LA, Tytgat J, Zega A, Mašič LP. Discovery of K V 1.3 ion channel inhibitors: Medicinal chemistry approaches and challenges. Med Res Rev 2021; 41:2423-2473. [PMID: 33932253 PMCID: PMC8252768 DOI: 10.1002/med.21800] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/03/2021] [Accepted: 03/19/2021] [Indexed: 12/12/2022]
Abstract
The KV 1.3 voltage-gated potassium ion channel is involved in many physiological processes both at the plasma membrane and in the mitochondria, chiefly in the immune and nervous systems. Therapeutic targeting KV 1.3 with specific peptides and small molecule inhibitors shows great potential for treating cancers and autoimmune diseases, such as multiple sclerosis, type I diabetes mellitus, psoriasis, contact dermatitis, rheumatoid arthritis, and myasthenia gravis. However, no KV 1.3-targeted compounds have been approved for therapeutic use to date. This review focuses on the presentation of approaches for discovering new KV 1.3 peptide and small-molecule inhibitors, and strategies to improve the selectivity of active compounds toward KV 1.3. Selectivity of dalatazide (ShK-186), a synthetic derivate of the sea anemone toxin ShK, was achieved by chemical modification and has successfully reached clinical trials as a potential therapeutic for treating autoimmune diseases. Other peptides and small-molecule inhibitors are critically evaluated for their lead-like characteristics and potential for progression into clinical development. Some small-molecule inhibitors with well-defined structure-activity relationships have been optimized for selective delivery to mitochondria, and these offer therapeutic potential for the treatment of cancers. This overview of KV 1.3 inhibitors and methodologies is designed to provide a good starting point for drug discovery to identify novel effective KV 1.3 modulators against this target in the future.
Collapse
Affiliation(s)
- Špela Gubič
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Louise A. Hendrickx
- Toxicology and PharmacologyUniversity of Leuven, Campus GasthuisbergLeuvenBelgium
| | - Žan Toplak
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Maša Sterle
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Steve Peigneur
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | | | - Luis A. Pardo
- AG OncophysiologyMax‐Planck Institute for Experimental MedicineGöttingenGermany
| | - Jan Tytgat
- Toxicology and PharmacologyUniversity of Leuven, Campus GasthuisbergLeuvenBelgium
| | - Anamarija Zega
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | | |
Collapse
|
10
|
Namba T, Hotta M, Tabata H, Makino K, Oshitari T, Natsugari H, Takahashi H. Atropisomeric Properties of N-Acyl/ N-Sulfonyl 5 H-Dibenzo[ b, d]azepin-7(6 H)-ones. J Org Chem 2021; 86:7563-7578. [PMID: 33998234 PMCID: PMC8279494 DOI: 10.1021/acs.joc.1c00594] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The stereochemistry
of N-acyl/N-sulfonyl 5H-dibenzo[b,d]azepin-7(6H)-ones (I, II) was examined in
detail by freezing the conformation with
a methyl group at the C-4 of dibenzoazepine. Because the two axes
(axis 1, axis 2) move together concertedly, I and II exist only as a pair of enantiomers [(a1R, a2R) and (a1S, a2S)], which was confirmed
by X-ray analysis of IIBc. It was elucidated that the
amide derivatives I exist in equilibrium with the E/Z-amide (100:2–100:34), which
means that the exocyclic bond (axis 3) is not in concert with the
endocyclic axes (axis 1, axis 2). For the preparation of 5H-dibenzo[b,d]azepin-7(6H)-one, the intramolecular Friedel–Crafts acylation
of N-(1,1′)-biphenyl-2-yl-glycine derivatives
was revisited. It was revealed that the electron-withdrawing property
of the amino-protective group was a key to the success of seven-membered
cyclization.
Collapse
Affiliation(s)
- Takuya Namba
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Mayuno Hotta
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Hidetsugu Tabata
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Kosho Makino
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Tetsuta Oshitari
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hideaki Natsugari
- Graduate School of Pharmaceutical Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideyo Takahashi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641Yamazaki, Noda-shi, Chiba 278-8510, Japan
| |
Collapse
|
11
|
Zhu WQ, Zhang J, Fan P, Shi LT, Li H, Yang MG, Li Y. Photocyclization synthesis of phenanthridine and its derivatives under direct dehydrogenation conditions. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
de la Cruz-Sánchez P, Pàmies O. Metal-π-allyl mediated asymmetric cycloaddition reactions. ADVANCES IN CATALYSIS 2021. [DOI: 10.1016/bs.acat.2021.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Affiliation(s)
- Ju Wang
- College of Pharmaceutical Science and Institute of Drug Development & Chemical Biology; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Chen-Fu Liu
- School of Pharmaceutical Sciences; Gannan Medical University; 341000 Ganzhou P. R. China
| | - Quan Zheng
- College of Pharmaceutical Science and Institute of Drug Development & Chemical Biology; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Guo-Wu Rao
- College of Pharmaceutical Science and Institute of Drug Development & Chemical Biology; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| |
Collapse
|
14
|
Trost BM, Zuo Z. Highly Regio‐, Diastereo‐, and Enantioselective Synthesis of Tetrahydroazepines and Benzo[
b
]oxepines through Palladium‐Catalyzed [4+3] Cycloaddition Reactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911537] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | - Zhijun Zuo
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| |
Collapse
|
15
|
Trost BM, Zuo Z. Highly Regio‐, Diastereo‐, and Enantioselective Synthesis of Tetrahydroazepines and Benzo[
b
]oxepines through Palladium‐Catalyzed [4+3] Cycloaddition Reactions. Angew Chem Int Ed Engl 2019; 59:1243-1247. [DOI: 10.1002/anie.201911537] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | - Zhijun Zuo
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| |
Collapse
|
16
|
Abstract
Heterocycles are very common substructures in a number of pharmaceuticals. Over the past several years, the use of palladium-catalyzed oxidative cyclization for heterocyclic synthesis has become much more prevalent. This review collects recent reports using palladium catalysis to synthesize a wide variety of heterocyclic scaffolds. Many of these reactions use oxygen as the terminal oxidant. Some salient mechanistic features are discussed.
Collapse
Affiliation(s)
- John C. Hershberger
- Department of Chemistry and Physics, Arkansas State University, State University, AR, United States
| |
Collapse
|
17
|
Usami K, Yamaguchi E, Tada N, Itoh A. Transition-Metal-Free Synthesis of Phenanthridinones through Visible-Light-Driven Oxidative C-H Amidation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900536] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kaoru Usami
- Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Eiji Yamaguchi
- Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Norihiro Tada
- Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| |
Collapse
|
18
|
Ling F, Xie Z, Chen J, Ai C, Shen H, Wang Z, Yi X, Zhong W. Cobalt(II)‐Catalyzed [5+2] C−H Annulation of
o
‐Arylanilines with Alkynes: An Expedient Route to Dibenzo‐[
b
,
d
]azepines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900261] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fei Ling
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Zhen Xie
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Jiachen Chen
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chongren Ai
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Haiwei Shen
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Ze Wang
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Xiao Yi
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Weihui Zhong
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou 310014 People's Republic of China
| |
Collapse
|
19
|
Cis,exo-1,2,3,4,4a,13b-hexahydro-1,4-methano-5-isopropoxy-9H-tribenzo[b,f]azepine. MOLBANK 2018. [DOI: 10.3390/m988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
|
20
|
Bai L, Wang Y, Ge Y, Liu J, Luan X. Diastereoselective Synthesis of Dibenzo[b,d]azepines by Pd(II)-Catalyzed [5 + 2] Annulation of o-Arylanilines with Dienes. Org Lett 2017; 19:1734-1737. [PMID: 28294624 DOI: 10.1021/acs.orglett.7b00503] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient method for the construction of dibenzo[b,d]azepines containing two distinct stereogenic elements in a highly diastereoselective fashion is described. The key of the [5 + 2] reaction is to form a π-allylpalladium species through sequential C-H activation and regiospecific migratory insertion of the diene. This observation contrasts with the behavior of 1,2-alkenes that generally underwent direct alkenylation via β-hydride elimination.
Collapse
Affiliation(s)
- Lu Bai
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710127, China
| | - Yan Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710127, China
| | - Yicong Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710127, China
| | - Jingjing Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710127, China
| | - Xinjun Luan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710127, China
| |
Collapse
|
21
|
Al-Sabi A, Daly D, Hoefer P, Kinsella GK, Metais C, Pickering M, Herron C, Kaza SK, Nolan K, Dolly JO. A Rational Design of a Selective Inhibitor for Kv1.1 Channels Prevalent in Demyelinated Nerves That Improves Their Impaired Axonal Conduction. J Med Chem 2017; 60:2245-2256. [PMID: 28225274 DOI: 10.1021/acs.jmedchem.6b01262] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
K+ channels containing Kv1.1 α subunits, which become prevalent at internodes in demyelinated axons, may underlie their dysfunctional conduction akin to muscle weakness in multiple sclerosis. Small inhibitors were sought with selectivity for the culpable hyper-polarizing K+ currents. Modeling of interactions with the extracellular pore in a Kv1.1-deduced structure identified diaryldi(2-pyrrolyl)methane as a suitable scaffold with optimized alkyl ammonium side chains. The resultant synthesized candidate [2,2'-((5,5'(di-p-topyldiaryldi(2-pyrrolyl)methane)bis(2,2'carbonyl)bis(azanediyl)) diethaneamine·2HCl] (8) selectively blocked Kv1.1 channels (IC50 ≈ 15 μM) recombinantly expressed in mammalian cells, induced a positive shift in the voltage dependency of K+ current activation, and slowed its kinetics. It preferentially inhibited channels containing two or more Kv1.1 subunits regardless of their positioning in concatenated tetramers. In slices of corpus callosum from mice subjected to a demyelination protocol, this novel inhibitor improved neuronal conduction, highlighting its potential for alleviating symptoms in multiple sclerosis.
Collapse
Affiliation(s)
| | | | | | - Gemma K Kinsella
- School of Food Science and Environmental Health, College of Sciences and Health, Dublin Institute of Technology , Cathal Brugha Street, Dublin 1, Ireland
| | | | - Mark Pickering
- UCD School of Medicine, University College Dublin , Dublin, Ireland
| | - Caroline Herron
- School of Biomolecular and Biomed Science, Conway Institute , Belfield, Dublin 4, Ireland
| | | | | | | |
Collapse
|
22
|
Yang Z, Chen F, Zhang S, He Y, Yang N, Fan QH. Ruthenium-Catalyzed Enantioselective Hydrogenation of Phenanthridine Derivatives. Org Lett 2017; 19:1458-1461. [DOI: 10.1021/acs.orglett.7b00419] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhusheng Yang
- Key
Laboratory of Environmentally Friendly Chemistry of the Ministry of
Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Fei Chen
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Shuxin Zhang
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yanmei He
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Nianfa Yang
- Key
Laboratory of Environmentally Friendly Chemistry of the Ministry of
Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
| | - Qing-Hua Fan
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| |
Collapse
|
23
|
Han YP, Song XR, Qiu YF, Zhang HR, Li LH, Jin DP, Sun XQ, Liu XY, Liang YM. Lewis Acid Catalyzed [4 + 3] Cycloaddition of Propargylic Alcohols with Azides. Org Lett 2016; 18:940-3. [DOI: 10.1021/acs.orglett.5b03657] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya-Ping Han
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xian-Rong Song
- Jiangxi
Key Laboratory of Organic Chemistry, Jiangxi Science Technology Normal University, Nanchang 330013, China
| | - Yi-Feng Qiu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Heng-Rui Zhang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Lian-Hua Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Dong-Po Jin
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Qing Sun
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xue-Yuan Liu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- State
Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical
Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| |
Collapse
|
24
|
Petho Z, Balajthy A, Bartok A, Bene K, Somodi S, Szilagyi O, Rajnavolgyi E, Panyi G, Varga Z. The anti-proliferative effect of cation channel blockers in T lymphocytes depends on the strength of mitogenic stimulation. Immunol Lett 2016; 171:60-9. [PMID: 26861999 DOI: 10.1016/j.imlet.2016.02.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/29/2016] [Accepted: 02/04/2016] [Indexed: 11/15/2022]
Abstract
Ion channels are crucially important for the activation and proliferation of T lymphocytes, and thus, for the function of the immune system. Previous studies on the effects of channel blockers on T cell proliferation reported variable effectiveness due to differing experimental systems. Therefore our aim was to investigate how the strength of the mitogenic stimulation influences the efficiency of cation channel blockers in inhibiting activation, cytokine secretion and proliferation of T cells under standardized conditions. Human peripheral blood lymphocytes were activated via monoclonal antibodies targeting the TCR-CD3 complex and the co-stimulator CD28. We applied the blockers of Kv1.3 (Anuroctoxin), KCa3.1 (TRAM-34) and CRAC (2-Apb) channels of T cells either alone or in combination with rapamycin, the inhibitor of the mammalian target of rapamycin (mTOR). Five days after the stimulation ELISA and flow cytometric measurements were performed to determine IL-10 and IFN-γ secretion, cellular viability and proliferation. Our results showed that ion channel blockers and rapamycin inhibit IL-10 and IFN-γ secretion and cell division in a dose-dependent manner. Simultaneous application of the blockers for each channel along with rapamycin was the most effective, indicating synergy among the various activation pathways. Upon increasing the extent of mitogenic stimulation the anti-proliferative effect of the ion channel blockers diminished. This phenomenon may be important in understanding the fine-tuning of T cell activation.
Collapse
Affiliation(s)
- Zoltan Petho
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Andras Balajthy
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Adam Bartok
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Krisztian Bene
- Department of Immunology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Sandor Somodi
- 1st Department of Internal Medicine, University of Debrecen, Debrecen, Hungary
| | - Orsolya Szilagyi
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Eva Rajnavolgyi
- Department of Immunology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary
| | - Gyorgy Panyi
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary.
| | - Zoltan Varga
- Department of Biophysics and Cell Biology, Faculty of General Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE-NAP B Ion Channel Structure-Function Research Group, RCMM, University of Debrecen, Debrecen, Egyetem tér 1, H-4032, Hungary
| |
Collapse
|
25
|
Song XR, Qiu YF, Liu XY, Liang YM. Recent advances in the tandem reaction of azides with alkynes or alkynols. Org Biomol Chem 2016; 14:11317-11331. [DOI: 10.1039/c6ob01965j] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Over the past few decades, the development of versatile methodologies to employ azides as aminating agents for the formation of nitrogen-containing compounds has attracted significant attention in synthetic chemistry.
Collapse
Affiliation(s)
- Xian-Rong Song
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Yi-Feng Qiu
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Xue-Yuan Liu
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| |
Collapse
|
26
|
Kobayashi H, Sasano Y, Kanoh N, Kwon E, Iwabuchi Y. Total Synthesis of the Proposed Structure of Turkiyenine. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501365] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
27
|
Zuo Z, Liu J, Nan J, Fan L, Sun W, Wang Y, Luan X. Highly Stereoselective Synthesis of Imine-Containing Dibenzo[b,d]azepines by a Palladium(II)-Catalyzed [5+2] Oxidative Annulation ofo-Arylanilines with Alkynes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508850] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
28
|
Zuo Z, Liu J, Nan J, Fan L, Sun W, Wang Y, Luan X. Highly Stereoselective Synthesis of Imine‐Containing Dibenzo[
b
,
d
]azepines by a Palladium(II)‐Catalyzed [5+2] Oxidative Annulation of
o
‐Arylanilines with Alkynes. Angew Chem Int Ed Engl 2015; 54:15385-9. [DOI: 10.1002/anie.201508850] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Indexed: 01/12/2023]
Affiliation(s)
- Zhijun Zuo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Jingjing Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Jiang Nan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Liangxin Fan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Wei Sun
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Yaoyu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| | - Xinjun Luan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 (China)
| |
Collapse
|
29
|
Ohya S, Nakamura E, Horiba S, Kito H, Matsui M, Yamamura H, Imaizumi Y. Role of the K(Ca)3.1 K+ channel in auricular lymph node CD4+ T-lymphocyte function of the delayed-type hypersensitivity model. Br J Pharmacol 2015; 169:1011-23. [PMID: 23594188 DOI: 10.1111/bph.12215] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 02/18/2013] [Accepted: 03/01/2013] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND AND PURPOSE The intermediate-conductance Ca(2+)-activated K(+) channel (K(Ca)3.1) modulates the Ca(2+) response through the control of the membrane potential in the immune system. We investigated the role of K(Ca)3.1 on the pathogenesis of delayed-type hypersensitivity (DTH) in auricular lymph node (ALN) CD4(+) T-lymphocytes of oxazolone (Ox)-induced DTH model mice. EXPERIMENTAL APPROACH The expression patterns of K(Ca)3.1 and its possible transcriptional regulators were compared among ALN T-lymphocytes of three groups [non-sensitized (Ox-/-), Ox-sensitized, but non-challenged (Ox+/-) and Ox-sensitized and -challenged (Ox+/+)] using real-time polymerase chain reaction, Western blotting and flow cytometry. KCa 3.1 activity was measured by whole-cell patch clamp and the voltage-sensitive dye imaging. The effects of K(Ca)3.1 blockade were examined by the administration of selective K(Ca)3.1 blockers. KEY RESULTS Significant up-regulation of K(Ca)3.1a was observed in CD4(+) T-lymphocytes of Ox+/- and Ox+/+, without any evident changes in the expression of the dominant-negative form, K(Ca)3.1b. Negatively correlated with this, the repressor element-1 silencing transcription factor (REST) was significantly down-regulated. Pharmacological blockade of K(Ca)3.1 resulted in an accumulation of the CD4(+) T-lymphocytes of Ox+/+ at the G0/G1 phase of the cell cycle, and also significantly recovered not only the pathogenesis of DTH, but also the changes in the K(Ca)3.1 expression and activity in the CD4(+) T-lymphocytes of Ox+/- and Ox+/+. CONCLUSIONS AND IMPLICATIONS The up-regulation of K(Ca)3.1a in conjunction with the down-regulation of REST may be involved in CD4(+) T-lymphocyte proliferation in the ALNs of DTH model mice; and K(Ca)3.1 may be an important target for therapeutic intervention in allergy diseases such as DTH.
Collapse
Affiliation(s)
- Susumu Ohya
- Department of Molecular & Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | | | | | | | | | | | | |
Collapse
|
30
|
Jorgensen C, Darré L, Vanommeslaeghe K, Omoto K, Pryde D, Domene C. In silico identification of PAP-1 binding sites in the Kv1.2 potassium channel. Mol Pharm 2015; 12:1299-307. [PMID: 25734225 DOI: 10.1021/acs.molpharmaceut.5b00023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Voltage-gated potassium channels of the Kv1 family play a crucial role in the generation and transmission of electrical signals in excitable cells affecting neuronal and cardiac activities. Small-molecule blockage of these channels has been proposed to occur via a cooperative mechanism involving two main blocking sites: the inner-pore site located below the selectivity filter, and a side-pocket cavity located between the pore and the voltage sensor. Using 0.5 μs molecular dynamics simulation trajectories complemented by docking calculations, the potential binding sites of the PAP-1 (5-(4-phenoxybutoxy)psoralen) blocker to the crystal structure of Kv1.2 channel have been studied. The presence of both mentioned blocking sites at Kv1.2 is confirmed, adding evidence in favor of a cooperative channel blockage mechanism. These observations provide insight into drug modulation that will guide further developments of Kv inhibitors.
Collapse
Affiliation(s)
- Christian Jorgensen
- †Department of Chemistry, Britannia House, 7 Trinity Street, King's College London, London SE1 1DB, U.K
| | - Leonardo Darré
- †Department of Chemistry, Britannia House, 7 Trinity Street, King's College London, London SE1 1DB, U.K
| | - Kenno Vanommeslaeghe
- ‡Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Kiyoyuki Omoto
- §Worldwide Medicinal Chemistry, Pfizer Neusentis, Portway Building, Granta Park, Great Abington, Cambridge CB21 6GS, U.K
| | - David Pryde
- §Worldwide Medicinal Chemistry, Pfizer Neusentis, Portway Building, Granta Park, Great Abington, Cambridge CB21 6GS, U.K
| | - Carmen Domene
- †Department of Chemistry, Britannia House, 7 Trinity Street, King's College London, London SE1 1DB, U.K.,∥Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| |
Collapse
|
31
|
Ye J, Limouni A, Zaichuk S, Lautens M. Synthesis of Enantioenriched 5,6-Dihydrophenanthridine Derivatives through retro-Carbopalladation of Chiralo-Bromobenzylamines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
32
|
Ye J, Limouni A, Zaichuk S, Lautens M. Synthesis of Enantioenriched 5,6-Dihydrophenanthridine Derivatives through retro-Carbopalladation of Chiralo-Bromobenzylamines. Angew Chem Int Ed Engl 2015; 54:3116-20. [DOI: 10.1002/anie.201411276] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Indexed: 11/07/2022]
|
33
|
Du ZT, Han P, Zhou J, Zhang CC, Chen K. Synthesis of Heterocycles via Palladium-Catalyzed C-H Activation/Cyclization of Diazonium Salts (Part III): Phenanthridin-6-(5H)-ones. HETEROCYCLES 2014. [DOI: 10.3987/com-14-13051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
34
|
Lener G, Carbonio RE, Moyano EL. Mixed Oxides as Highly Selective Catalysts for the Flash Pyrolysis of Phenacyl Benzotriazole: One-Pot Synthesis of Dibenzazepin-7-one. ACS Catal 2013. [DOI: 10.1021/cs3008335] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- German Lener
- Departamento de Química Orgánica, ‡Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, INFIQC (CONICET), Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - Raúl E. Carbonio
- Departamento de Química Orgánica, ‡Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, INFIQC (CONICET), Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - E. Laura Moyano
- Departamento de Química Orgánica, ‡Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, INFIQC (CONICET), Ciudad Universitaria, X5000HUA Córdoba, Argentina
| |
Collapse
|
35
|
Fernández-Ballester G, Fernández-Carvajal A, González-Ros JM, Ferrer-Montiel A. Ionic channels as targets for drug design: a review on computational methods. Pharmaceutics 2011; 3:932-53. [PMID: 24309315 PMCID: PMC3857065 DOI: 10.3390/pharmaceutics3040932] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 10/26/2011] [Accepted: 11/30/2011] [Indexed: 01/21/2023] Open
Abstract
Ion channels are involved in a broad range of physiological and pathological processes. The implications of ion channels in a variety of diseases, including diabetes, epilepsy, hypertension, cancer and even chronic pain, have signaled them as pivotal drug targets. Thus far, drugs targeting ion channels were developed without detailed knowledge of the molecular interactions between the lead compounds and the target channels. In recent years, however, the emergence of high-resolution structures for a plethora of ion channels paves the way for computer-assisted drug design. Currently, available functional and structural data provide an attractive platform to generate models that combine substrate-based and protein-based approaches. In silico approaches include homology modeling, quantitative structure-activity relationships, virtual ligand screening, similarity and pharmacophore searching, data mining, and data analysis tools. These strategies have been frequently used in the discovery and optimization of novel molecules with enhanced affinity and specificity for the selected therapeutic targets. In this review we summarize recent applications of in silico methods that are being used for the development of ion channel drugs.
Collapse
|
36
|
Straub SV, Perez SM, Tan B, Coughlan KA, Trebino CE, Cosgrove P, Buxton JM, Kreeger JM, Jackson VM. Pharmacological inhibition of Kv1.3 fails to modulate insulin sensitivity in diabetic mice or human insulin-sensitive tissues. Am J Physiol Endocrinol Metab 2011; 301:E380-90. [PMID: 21586699 DOI: 10.1152/ajpendo.00076.2011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Genetic ablation of the voltage-gated potassium channel Kv1.3 improves insulin sensitivity and increases metabolic rate in mice. Inhibition of Kv1.3 in mouse adipose and skeletal muscle is reported to increase glucose uptake through increased GLUT4 translocation. Since Kv1.3 represents a novel target for the treatment of diabetes, the present study investigated whether Kv1.3 is functionally expressed in human adipose and skeletal muscle and whether specific pharmacological inhibition of the channel is capable of modulating insulin sensitivity in diabetic mouse models. Voltage-gated K(+) channel currents in human skeletal muscle cells (SkMC) were insensitive to block by the specific Kv1.3 blockers 5-(4-phenoxybutoxy)psoralen (PAP-1) and margatoxin (MgTX). Glucose uptake into SkMC and mouse 3T3-L1 adipocytes was also unaffected by treatment with PAP-1 or MgTX. Kv1.3 protein expression was not observed in human adipose or skeletal muscle from normal and type 2 diabetic donors. To investigate the effect of specific Kv1.3 inhibition on insulin sensitivity in vivo, PAP-1 was administered to hyperglycemic mice either acutely or for 5 days prior to an insulin tolerance test. No effect on insulin sensitivity was observed at free plasma PAP-1 concentrations that are specific for inhibition of Kv1.3. Insulin sensitivity was increased only when plasma concentrations of PAP-1 were sufficient to inhibit other Kv1 channels. Surprisingly, acute inhibition of Kv1.3 in the brain was found to decrease insulin sensitivity in ob/ob mice. Overall, these findings are not supportive of a role for Kv1.3 in the modulation of peripheral insulin sensitivity.
Collapse
Affiliation(s)
- Stephen V Straub
- Cardiovascular, Metabolic, and Endocrine Diseases Research Unit, Pfizer, Eastern Point Rd., Groton, CT 06340, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Le Gall E, Pignon A, Martens T. A practical route to tertiary diarylmethylamides or -carbamates from imines, organozinc reagents and acyl chlorides or chloroformates. Beilstein J Org Chem 2011; 7:997-1002. [PMID: 21915199 PMCID: PMC3167876 DOI: 10.3762/bjoc.7.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 06/22/2011] [Indexed: 11/23/2022] Open
Abstract
A practical route to tertiary diarylmethylamides or -carbamates from imines, organozinc reagents and acyl chlorides or chloroformates is described. This route involves the formation of an imine, which is used without isolation, followed by its activation by the carbonyl-containing electrophile and the trapping of the acyliminium by an organozinc reagent. Most steps are conducted concomitantly to render the procedure as practical and straightforward as possible. Therefore, the whole experimental protocol takes less than two hours.
Collapse
Affiliation(s)
- Erwan Le Gall
- Électrochimie et Synthèse Organique, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Antoine Pignon
- Électrochimie et Synthèse Organique, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Thierry Martens
- Électrochimie et Synthèse Organique, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
| |
Collapse
|
38
|
Wu SN, Chen BS, Lo YC. Evidence for aconitine-induced inhibition of delayed rectifier K(+) current in Jurkat T-lymphocytes. Toxicology 2011; 289:11-8. [PMID: 21782880 DOI: 10.1016/j.tox.2011.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 02/07/2023]
Abstract
Aconitine (ACO) is a highly toxic diterpenoid alkaloid and known to exert the immunomodulatory action. However, whether it has any effects on ion currents in immune cells remains unknown. The effects of ACO and other related compounds on ion currents in Jurkat T-lymphocytes were investigated in this study. ACO suppressed the amplitude of delayed-rectifier K(+) current (I(K(DR))) in a time- and concentration-dependent manner. Margatoxin (100 nM), a specific blocker of K(V)1.3-encoded current, decreased the I(K(DR)) amplitude in these cells and the ACO-induced inhibition of I(K(DR)) was not reversed by 1-ethyl-2-benzimidazolinone (30 μM) or nicotine (10 μM). The IC(50) value for ACO-mediated inhibition of I(K(DR)) was 5.6 μM. ACO accelerated the inactivation of I(K(DR)) with no change in the activation rate of this current. Increasing the ACO concentration not only reduced the I(K(DR)) amplitude, but also accelerated the inactivation time course of the current. With the aid of minimal binding scheme, the inhibitory action of ACO on I(K(DR)) was estimated with a dissociation constant of 6.8 μM. ACO also shifted the inactivation curve of I(K(DR)) to a hyperpolarized potential with no change in the slope factor. Cumulative inactivation for I(K(DR)) was enhanced in the presence of ACO. In Jurkat cells incubated with amiloride (30 μM), the ACO-induced inhibition of I(K(DR)) remained unaltered. In RAW 264.7 murine macrophages, ACO did not modify the kinetics of I(K(DR)), although it suppressed I(K(DR)) amplitude. Taken together, these effects can significantly contribute to its action on functional activity of immune cells if similar results are found in vivo.
Collapse
Affiliation(s)
- Sheng-Nan Wu
- Department of Physiology, National Cheng Kung University Medical College, Tainan City, Taiwan.
| | | | | |
Collapse
|
39
|
Smith JA, Molesworth PP, Hyland CJ, Ryan JH. Seven-Membered Rings. PROGRESS IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/s0959-6380(11)22016-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
40
|
Haffner CD, Thomson SA, Guo Y, Petrov K, Larkin A, Banker P, Schaaf G, Dickerson S, Gobel J, Gillie D, Condreay JP, Poole C, Carpenter T, Ulrich J. Substituted N-{3-[(1,1-dioxido-1,2-benzothiazol-3-yl)(phenyl)amino]propyl}benzamide analogs as potent Kv1.3 ion channel blockers. Part 2. Bioorg Med Chem Lett 2010; 20:6989-92. [PMID: 20974533 DOI: 10.1016/j.bmcl.2010.09.131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 09/23/2010] [Accepted: 09/24/2010] [Indexed: 10/19/2022]
Abstract
We report the synthesis and in vitro activity of a series of novel substituted N-{3-[(1,1-dioxido-1,2-benzothiazol-3-yl)(phenyl)amino]propyl}benzamide analogs. These analogs showed potent inhibitory activity against Kv1.3. Several demonstrated similar potency to the known Kv1.3 inhibitor PAP-1 when tested under the IonWorks patch clamp assay conditions. Two compounds 13i and 13rr were advanced further as potential tool compounds for in vivo validation studies.
Collapse
Affiliation(s)
- Curt D Haffner
- Department of Medicinal Chemistry, GlaxoSmithKline Research and Development, Research Triangle Park, NC 27709, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Haffner CD, Thomson SA, Guo Y, Schaller LT, Boggs S, Dickerson S, Gobel J, Gillie D, Condreay JP. N-{3-[(1,1-dioxido-1,2-benzothiazol-3-yl)(phenyl)amino]propyl}benzamide analogs as potent Kv1.3 inhibitors. Part 1. Bioorg Med Chem Lett 2010; 20:6983-8. [PMID: 20971642 DOI: 10.1016/j.bmcl.2010.09.132] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 09/23/2010] [Accepted: 09/24/2010] [Indexed: 10/19/2022]
Abstract
We report the synthesis and in vitro activity of a series of novel N-{3-[(1,1-dioxido-1,2-benzothiazol-3-yl)(phenyl)amino]propyl}benzamide analogs. These analogs showed potent inhibitory activity against Kv1.3. Several compounds, including compound 8b, showed similar potency to the known Kv1.3 inhibitor PAP-1 when tested under the IonWorks patch clamp assay conditions.
Collapse
Affiliation(s)
- Curt D Haffner
- Department of Medicinal Chemistry, GlaxoSmithKline Research and Development, Research Triangle Park, NC 27709, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Dubost E, Magnelli R, Cailly T, Legay R, Fabis F, Rault S. General method for the synthesis of substituted phenanthridin-6(5H)-ones using a KOH-mediated anionic ring closure as the key step. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
43
|
Abstract
For more than 25 years, it has been widely appreciated that Ca2+ influx is essential to trigger T-lymphocyte activation. Patch clamp analysis, molecular identification, and functional studies using blockers and genetic manipulation have shown that a unique contingent of ion channels orchestrates the initiation, intensity, and duration of the Ca2+ signal. Five distinct types of ion channels--Kv1.3, KCa3.1, Orai1+ stromal interacting molecule 1 (STIM1) [Ca2+-release activating Ca2+ (CRAC) channel], TRPM7, and Cl(swell)--comprise a network that performs functions vital for ongoing cellular homeostasis and for T-cell activation, offering potential targets for immunomodulation. Most recently, the roles of STIM1 and Orai1 have been revealed in triggering and forming the CRAC channel following T-cell receptor engagement. Kv1.3, KCa3.1, STIM1, and Orai1 have been found to cluster at the immunological synapse following contact with an antigen-presenting cell; we discuss how channels at the synapse might function to modulate local signaling. Immuno-imaging approaches are beginning to shed light on ion channel function in vivo. Importantly, the expression pattern of Ca2+ and K+ channels and hence the functional network can adapt depending upon the state of differentiation and activation, and this allows for different stages of an immune response to be targeted specifically.
Collapse
Affiliation(s)
- Michael D Cahalan
- Department of Physiology and Biophysics, and the Institute for Immunology, University of California, Irvine, Irvine, CA 92697-4561, USA.
| | | |
Collapse
|